/*
 * Copyright (C) 2017-2019 Dremio Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.dremio.services.credentials;

import java.io.IOException;
import java.net.URI;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;

import com.google.inject.Inject;

/**
 * File Credential Provider.
 */
public class FileCredentialsProvider extends AbstractSimpleCredentialsProvider implements CredentialsProvider {

  @Inject
  public FileCredentialsProvider() {
    super("file");
  }

  @Override
  protected String doLookup(URI uri) throws CredentialsException {
    try {
      String filePath = uri.getPath();
      String content = new String(Files.readAllBytes(Paths.get(filePath)), StandardCharsets.UTF_8);
      return content;
    } catch (IOException e) {
      throw new FileCredentialsException("Encountered an IO error while reading file.", e);
    }
  }

}
